Mitsubishi Galant (2004+). Manual - part 251

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-195

INSPECTION PROCEDURE D-3: Power Window: Only the front door window (LH) does not work by 
operating power window main switch.

.

CIRCUIT OPERATION
The front power window regulator motor (LH) lower 
or raises the door window (LH) when the power win-
dow main switch is moved to "UP" or "DOWN" posi-
tion.

.

TECHNICAL DESCRIPTION (COMMENT)
The power window main switch or the front power 
window regulator motor (LH) may be defective.

.

TROUBLESHOOTING HINTS

• The power window main switch may be defective

• The front power window regulator motor (LH) 

may be defective

• The wiring harness or connectors may have 

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

.

POWER
WINDOW RELAY

POWER WINDOW 
MAIN SWITCH

FRONT DOOR WINDOW
REGULATOR MOTOR 

(LH)

Power Window (front: LH) Circuit

AC305262

CONNECTORS:E-12,E-13

E-12

E-13(GR)

AD

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-196

DIAGNOSIS

Required Special Tool:

• MB991223: Harness Set

STEP 1. Check power window main switch connector E-12 
and front power window regulator motor (LH) connector 
E-13 for loose, corroded or damaged terminals, or 
terminals pushed back in the connector.

Q: Are power window main switch connector E-12 and 

front power window regulator motor (LH) connector 
E-13 in good condition?
YES : Go to Step 2.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. When the power window main switch is 

operated, the front power window (LH) should lower 
or raise normally.

STEP 2. Check the power window main switch.
(1) Remove the power window main switch. Refer to GROUP 

42, Door, Door Glass and Regulator 

P.42-39

.

(2) Check continuity while power window main switch is moved 

to "UP" and "DOWN" position.

Q: Is the power window main switch normal?

YES : Go to Step 3.
NO :  Replace the power window main switch. When the 

power window main switch is operated, the front 
power window (LH) should lower or raise normally.

AC305331

AB

CONNECTORS:E-12,E-13

3
9

4

12

14

6

13

5

1110

8

2

7

1

HARNESS SIDE

E-12

E-13

E-12

E-13(GR)

HARNESS SIDE

FRONT (LH) 
SWITCH 
POSITION

TESTER 
CONNECTION

SPECIFIED 
CONDITION

UP

8 

− 13, 9 − 12

Less than 2 ohms

OFF

8 

− 9, 8 − 12, 9 − 12

DOWN

8 

− 12, 9 − 13

AC210745

12

7

1

8

2

10

9

3

11

13

5

4

14

6

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-197

STEP 3. Check the front power window regulator motor 
(LH).

(1) Remove the front power window regulator motor (LH). 

Refer to GROUP 42, Door, Door Glass and Regulator 

P.42-39

.

(2) Connect a battery to the motor terminal, and check that the 

motor runs freely.

Q: Is the front power window regulator motor (LH) normal?

YES : Go to Step 4.
NO :  Replace the front power window regulator motor (LH). 

When the power window main switch is operated, the 
front power window (LH) should lower or raise 
normally.

STEP 4. Check the wiring harness between power window 
main switch connector E-12 (terminals 8 and 9) and front 
power window regulator motor (LH) connector E-13 
(terminals 2 and 1).

Q: Is the wiring harness between power window main 

switch connector E-12 (terminals 8 and 9) and front 
power window regulator motor (LH) connector E-13 
(terminals 2 and 1) in good condition?
YES : No action is necessary and testing is complete.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary. When the 
power window main switch is operated, the front 
power window (LH) should lower or raise normally.

BATTERY CONNECTION

SLIDER POSITION

• Connect terminal 1 to the 

negative battery terminal

• Connect terminal 2 to the 

positive battery terminal

UP

• Connect terminal 2 to the 

negative battery terminal

• Connect terminal 1 to the 

positive battery terminal

DOWN

1 2

AC204901AB

AC305331

AB

CONNECTORS:E-12,E-13

3
9

4

12

14

6

13

5

1110

8

2

7

1

HARNESS SIDE

E-12

E-13

E-12

E-13(GR)

HARNESS SIDE

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-198

INSPECTION PROCEDURE D-4: Power Window: Power windows do not work normally by operating 
the front passenger's or rear passenger's sub switches.

5

FUSIBLE LINK

POWER
WINDOW
RELAY

ETACS-ECU

POWER 
WINDOW 
MAIN 
SWITCH

FRONT DOOR WINDOW
REGULATOR MOTOR 

(RH)

FRONT POWER 
WINDOW 
SUB SWITCH

<PASSENGER'S SIDE>

Power Window (front: RH) Circuit